Xyst is a Navier-Stokes solver for engineering flows.

The goal of this project is to simulate engineering problems with a production-quality code that is extensible and maintainable, using hardware resources efficiently, even for problems with unpredictable, heterogeneous, and dynamic compute-load distribution.

The software implementation facilitates the effective use of hardware of any size, from laptops to the largest distributed-memory clusters, by combining data-, and task-parallelism on top of the Charm++ runtime system. Charm++'s execution model is asynchronous by default, allowing arbitrary overlap of computation and communication. Built-in automatic load balancing enables redistribution of heterogeneous computational load based on real-time CPU load measurement at negligible cost. The runtime system also features automatic checkpointing, fault tolerance, resilience against hardware failure, and supports power-, and energy-aware computation.

More details at xyst.cc.